(Good at running) Excellent plastic track has a series of characteristics such as flat ground, moderate elasticity, good weather resistance and strong impact. However, after long-term use, there will be quality problems such as water accumulation, unevenness and damage in the site. Today, Haorunjun will explain the crude oil and solutions to the quality problem of water accumulation in plastic runways!
1 phenomenon
During or after the leveling of the construction site, the site is uneven, and water accumulates locally or in a large area.
2. Cause analysis
(1) When the ground level fill area is large or deep, the backfill pressure (rammer) is not separated, the soil density is uneven or insufficient, and it sinks unevenly when it meets water, resulting in water accumulation.
(2) There is no drainage ditch around the site; Or the site is not made into a certain drainage slope; Or there is a reverse drainage slope.
(3) The measurement error makes the site uneven.
3. Preventive measures
(1) Before leveling, organize drainage system design for drainage slopes, drains, intercepting ditches and sewers of the whole site. During construction, based on the principle of underground first and then on the ground, the drainage facilities should be done first to make the whole site drainage unobstructed. The drainage slope shall be set according to the design requirements. If there is no requirement in the design and the terrain is flat, the vertical and horizontal gradient shall be no less than 0.2% to facilitate drainage. A drainage ditch (intercepting ditch) shall be set around or within the site, and its section, velocity and slope shall comply with relevant regulations.
(2) Backfill carefully, and roll (tamp) the filled soil in the site by layers to make its compactness not lower than the design requirements. When there is no requirement in the design, it should also be backfilled by layers and compacted by layers, so that the relative density is not less than 85% to avoid loose filling. The compaction method of fill should be reasonably selected according to the type of soil and engineering conditions.
(3) Do a good job of survey recheck to prevent elevation error.
4. Governance methods
The site with accumulated water should be drained immediately, and water interception facilities should be used for drainage. There is no drainage slope or the slope is small, so the slope should be repaired again; For local low-lying areas, fill the soil and roll it (ram) until it meets the requirements to avoid water accumulation again.